Heating apparatus.



J. H. KOONS.

PATENTED NOV. 13, 1906.

HEATING APPARATUS.

APPLICATION FILED 0OT.12. 1905.

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UNITED STATES PATENT OFFIOE.

Specification of Letters Patent.

Patented Nov. 13, 1906.

Application led October 12, 1905. Serial No. 282,487.

To all whom t may con/cern,.-

Beit known that I, JOHN HENRY KooNs, a citizen of the United States, and a resident of Anderson, in the county of Madison and State of Indiana, have invented a new and Improved Heating Apparatus, of which the following is a full, clear, and exact description.

This invention relates to improvements in heating apparatus in which air under high and low pressure with crude oil or gas are used as a fuel, the object being to provide a heater of this character that will be simple in construction and by means of which an intense heat may be maintained under a hot blast, a system particularly adapting the device for use in connection with meltingfurnaces, tempering or annealing furnaces, blacksmiths forges, and the like.

I will describe a heating apparatus embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both the figures.

` Figure 1 is a sectional elevation of a heater embodying my invention, and Fig. 2 is a section on the line of Fig, 1.

Referring to the drawings, 1 designates the casing of the heater divided by a partition or hood 2 into upper and lower chambers 3 4, and from this hood a stack 5 leads outward through the top of the casing. Extending around the stack 5 within the chamber 3 is a boxing 6, through which low pressure or atmospheric air is received through an inlet-pipe 7, and within this boxing are baffle-plates 8 9, which are arranged one above the other and extend from opposite sides, each baffle-plate terminating a short istance from the wall opposite that from which it extends, thus providing a passage for air. These baffle-plates cause the air to circulate around the stack 5 and become heated, as will be hereinafter described. From the lower portion of the boxing 6 a pipe 10 leads downward, first passing into the lower portion of the stack 5 and then into a chamber, where it branches in opposite directions to form at each side turned ends 11 12, from the outer members 12 of which the pipes extend downward and communicate with burners 13, leading into a furnace .or adle 14 of any suitable construction and in which the material to be treated is placed. The blast from the low-pressure pipe and the high-pressure pipe may be governed by gate-valves 15, arranged in the low-pressure pipes near the junction with the burners. It will be noted that the members 7 6 10 and the parts leading therefrom to the burners are practically a single low-pressure supply.

A small pipe 16 for supplying air under high pressure or for supplying steam is coiled around the stack 5 above the boxing 6, as indicated at 17, and thence it is led downward and through the low-pressure pipe Within the chamber 4, then is branched outward and carried up through the members 11 of the return-bends, and thence'down into the lowpressure pipes near the burners. An oil or gas supply pipe 18 has branches 19, which pass downward through the lower verticallydisposed portions members, as clearly indicated in the ings, and thence into the burners, these branch pipes being provided with regulatingvalves 20. By passing the branch pipes 19 through the low-pressure pipes the oil or gas will be highly heated, it being understood that both the high and low pressure supply of air is heated by the hot blast arising from the furnace or ladle 14 through an opening in its top.

It will be noted, especially in Fig. 2, that the mixed air or steam and oil or gas enter the furnace practically in parallelism, but at opposite sides, so that the pressure of one burner is exerted against one side of the material in the furnace, while the pressure from the other burner is exerted against the opposite side, thus causing a whirling motion, producing an intense heat that quickly melts any metal or other material under treatment. It may be stated that a crucible containing the material to be melted may be placed in the furnace and become highly heated.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A heating apparatus comprising a casing divided into upper and lower chambers, a stack leading from the lower chamber, a boxing surrounding the stack within the upper chamber, baffle-plates in said boxing, burners leading to a device in which heat is of the low-pressure-pipe draw- A IOO to be produced, a low-pressure air-pipe communicating with said burners, a portion of said pipe being formed by said boxing, a high-pressure pipe leading through a portion of the low-pressure pipe and communicating with the burners, and an oil or gas supply pipe having communication with the burners.

2. A heating apparatus comprising a casing divided into upper and lower chambers, a stack leading from the lower chamber through the top of the upper chamber, a box surrounding the stack within the upper chamber, devices in said box Jfor causing air to pass around the stack, a low-pressure airsupply pipe leading into said box and having a portion leading'from said box and having branches at its lower portion, branches with which said first-named branches communicate, a high-pressure pipe having a portion coiled around the stack and having a portion extending through parts of the low-pressure pipe and branched to communicate with the low-pressure pipe near the junctions with having branches leading through portions.

of the low-pressure pipe and into the burners.

3. A heating apparatus comprising acasing divided into upper and lower chambers, high and low pressure pipes leading through said chambers, said high-pressure pipe having portions extending longitudinally through parts of the low-pressure pipe in the lower chamber, burners with which said pipes communicate, an oil or gas supply pipe communicating with the burners, and a furnace into which the burners discharge, the said furnace being so arranged that the hot gases therefrom will pass through the lower chamber of the casing to heat the high and low pressure air.

In testimony whereof l have signed my name to this specification in the presence of two subscribing witnesses.

JOHN HENRY KOONS.

Vitnesses:

BENJAMIN F. SAPP, WILLIAM H. HOFFMAN. 

